<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<script src='vue.js'></script>
</head>
<body>
	<div id="app">{{content}}</div>

	<script>
		var app = new Vue({
			el: '#app',
			data: function () {
				return {
					content: 'hello world'
				}
			}
		})

		setTimeout(function(){
			app.$data.content = 'bye world';
		},2000)
	</script>
</body>
</html>